Field Controls PVE-100 Instructions Manual page 4

BTU/HR Input
PVE-100
3"
25,000 270
55,000 100
70,000 -
100,000 -
145,000 -
220,000 -
310,000 -
400,000 -
520,000 -
610,000 -
700,000 -
900,000 -
1,000,000 -
1,250,000 -
PROCEDURE FOR CALCULATING TOTAL EQUIVALENT PIPE LENGTH IN FEET
1. Calculate the total equivalent feet for each type of fi tting used in the venting system from the chart below.
2. Calculate the total amount of feet for the straight lengths of vent pipe.
3. Add the equivalent feet for the fi ttings with the total amount of feet of straight lengths.
EQUIVALENT LENGTH (FEET) OF VENT PIPE FOR VENT PIPE FITTINGS
Vent Pipe Fittings
TEE
90º ELBOW
45º ELBOW
1 ⁄
4
REDUCER
1 ⁄
2
( d ⁄ )*
D
3 ⁄
4
*Reducer or increaser ratio (
diameter. Example 4" to 8" reducer, the reducer ratio is
To estimate the equivalent foot length for the fi tting, use the smaller pipe
diameter for the equivalent length fi gure. Example 4" to 8" reducer;
the reducer ratio is 1 ⁄ and the smaller pipe diameter is 4". So, from the
2
chart, the equivalent feet would be 7 feet.
Example:
System Pipe Size = 4"
Step 1 Two 4" - 90° Elbows = 14 Ft.
Step 2 Ten 2 Ft. Lengths of 4" Pipe = 20 Ft.
Step 3 Total Equivalent Feet = 14 Ft. + 20 Ft. = 34 Ft.
MAXIMUM EQUIVALENT HORIZONTAL PIPE LENGTH (FEET)
Venter Model and Vent Pipe Diameter
PVE-300
4" 4" 5"
455 - -
169 - -
144 - -
100 305 -
- 145 247
- 64 100
- - 54
- - -
- - -
- - -
- - -
- - -
- - -
- - -
3" 4"
19 25
5 7
3 4
8 11
5 7
2 3
d
⁄ ) small diameter divided by the larger
D
PVE-600
6" 5"
- -
- -
- -
- -
334 413
147 181
74 91
- 54
- -
- -
- -
- -
- -
- -
Vent Pipe Diameter
5" 6" 7"
31 38 44
9 11 12
4 5 6
14 17 19
8 10 12
3 4 4
d ⁄ = 4 ⁄ = 1 ⁄ .
D 8 2
page 4
PVE-1200
6" 8" 8"
- - -
- - -
- - -
- - -
- - -
- - -
146 216 -
87 134 -
52 86 443
- 66 313
- - 227
- - 180
- - 125
- - -
8" 9"
50 56
14 16
7 8
22 25
13 15
5 6
Typical Pipe Fitting
10"
-
-
-
-
-
-
-
-
-
390
330
290
190
80
10"
63
18
9
28
17
6
Figure 3